Remove duplicates by using formula

Any formula which can remove the duplicate on each row which shown in the results on worksheet? Thank you in advance

D2
{=textjoin(" & ",,if(match(a2:c2,a2:c2,)=column(a2:c2),a2:c2,""))}

Sorry it came out an error "You 've entered too few of arguments for this function"

press CTRL + Shift + Enter at the same time. You should see curly braces {} if it's entered correctly

Sorry it still didnt work for me. Can you apply your formula into the worksheet directly?

The attachment is here

Thank you for your help